GEOLOGY OF SARATOGA SPRINGS AND VICINITY 



33 



the Cambric and Ordovicic of former classifications. Whether the 

 Ozarkic is ultimately given the rank of a system or is regarded 

 simply as a series forming the uppermost division of the Cambric, 

 does not concern us here ; but rather the fact that the r.bove-listed 



formations are of Ozarkic age. 



Formation 



o Canajoharie formation 



Glens Falls formation 



Amsterdam formation 



Little Falls formation 



Theresa formation 



Potsdam formation 



Precambric 



Schenectady formation 



Section 



Oc 



Oa 



CI 



Ch 



Ct 

 Cp 



' ■ '■' ■ ' 



rc^ig 



^=T=q=^ 



TT~r 



^^T=^ 



J-^T 



ie±t 



^ 



i==:l 



j..:.i.;..i 



F^ 



■ ' ■ ■ ■ 



Character of formation 



Black and gray shales, grit 

 ?nd sandstone 



700» + . 



Black sh Jes of lower Trenton 

 age; in part soft, in part 

 hard a nd slaty 



300- 



400' 



Alternating black shale and 

 thin black limestone 



Blue, fossiliferous limestone 



Massive, irregularly bedded 

 dolomite, dark to light gray 

 color 



Hovt limestone member. 

 Dolomite and limestone 

 with black oolite 



50— 

 ISO' 



Alternating sandstone and 

 dolomite 



Coarse sandstone with basal 

 conglomerate 



Kig. 3 Generalized columnar section of the rocks of the Saratoga quad- 

 rangle, and of the western portion of tlie Schuylerville quadrangle. 



